One day after the official release of Ubuntu 12.04 Alpha 2 LTS Precise Pangolin, Unity 5.2 user interface is available to update from Precise repository. The last release brings several changes to Unity Dash and Compiz improvements to decrease Ubuntu Unity plugin crashes.

Ubuntu Home Dash

Ubuntu home dash no longer display applications shortcuts and now shows the recent search result for applications, files, and directories through home dash icon.

Applications Lens

It shows the recently used applications instead of most frequently used applications.

Music Lens

Music lens has a small layout change, it now shows the 3 column for genre filter category.

Applications Switcher

Now you can run and switch between applications through the Unity Launcher with“Super+Tab” and for reverse mode using “Super+Shift+Tab”. To Adjust the shortcut keys go to CompizConfig settings manager “CCSM” from “Ubuntu Unity Plugin” then you will find it beneath behavior tab.

Keyboard Shortcut Overlay

Hold the Super Key will display the the keyboard shortcut overlay, with several keyboard shortcuts become very helpful to quick control Unity user interface elements. You might want to Check Unity The HUD feature “still under development and not updated for Unity 5.2 yet”.

Salam brother.
Here is an “unofficial” PPA for Unity 5.2. But it’s not recommended to use it on Ubuntu 11.10 because it’s still under development.
sudo apt-add-repository ppa:suraia/ppa
sudo apt-get update
sudo apt-get install unity